Depth and inclination indicator and recorder.



Patented Dec. 2. I902.

- u, s. LATHROP.

DEPTH AND INGLINATION INDIQA'TOR AND RECORDER.

A lication filed Jun 15, 1901.

cm; mum.)

[)VVENTOR.

ATTORNEY.

W1TNESSES.-

- S E PATENT OFFIC specification. 1 to HENRY s. LATHROP, or SANFRANCISCO, CALIFORNIA.

DEPIITHAEND momma-non l NDICATOR ANP ascoeosaz:

SPEGIFIGATION forming partfi'f Letters Patent N0. 715,095, datedDecember 2, 1902.

Application ma l'nne'lii, 1901.

To an wh om -it maiy concern: 1 Be it knowp thggtl, HENRY S. LATHROP, acitizen of the UnitedStates, residing at S Francisco, in the county ofSan Francisco add State of Calif rniafiiave iu vented certain new-and.useful provemeuts in a Depth-Gage, Inclinometer, and AutomaticBalance -for Submarine Boats, of whichjthe following is a My inventionrelates to an improved device forautomaticallyrecording the inclinationof h submarine boatand also for automatically. recording the depth towhich the boat is sub merged. a

My invention therefore resides in the novel construction, combination,and arrangement. of parts .for the above ends, hereinafter fullyspecifiedmnd particularlypoiu'ted out in the claims.

In. the accompanying drawings, Figure 1 is a diagrammatic view of asubmarine boat equipped with my recording-device. Fig. 2 is an-enlargedfront elevation of the recording device, parts being shown in verticalsection. Fig. 3 is a plan view of the same, broken away in part. Fig. 4is a broken horizontal section of one end of the boat. Fig- 5 is acentral section of the pressure-transmittiug device. Fig. 6 is ahorizontal section on the line AA of Fig, 2. Referring tothe drawings, 1represents the shell of a submarine boat, and 2 represents the lookoutthereof.

3 3 are narrow tubes leading from the side of the boat at the bow andstern, respectively, to pressure-transmitting devices 4, located at the'bow' and stern. Eaclr of said devices 45 comprises. two diap'hragms 5and 6, difiering in area, the larger diaphragm 5 being open to thepressure of the surrounding water through the tube 3 and the smallerdiaphragm 6 transmitting pressure to a narrow tube 7. Said diaphragms 5and am suitably held in a casing 8 and with said casing 8 form twopressure-chambers, which are connected by a pipe 9, provided with a cook10 for opening and closing the passage through said pipe.

The narrow tubes 7 lead-from the pressuretransmitting d vices at the bowand stem of the boat to a as tral point below the lookout and 'aretheremonnected to'a depth-gage and Serial No. 84,750. (No model.)

ratus is mounted 'upon' a board 12. I Secured lin'd'rical guides 14," tothe lower ends of which are attached the ends of thetnbes 7. j In saidguides 14 to preventthe escape of the water under pressure. tached rods16, which slide-vertically in guides 17 18, fixedly secured upon theboard 12,and'

engage slots 20 iu-a pointer 21, pivoted at 22 cording-paper is causedto be unwound from the roller 34 and wound up on a roller 35, the latterroller being actuated by a spring 36. and moving forward under theaction of said roller 37; which is in frictional contact with therecording-paper 33, 'and prevents motion thereof except in unison withits own motion. a Said latter movement is caused byrneans of a clock 38,the roller 37 being mounted upon the ment of the frame 23 is resisted bymeans of a spring 39, there being a cord 40 attached at said pulley 41being attached to the upper end of said spring 39 and the lower end-ofthe frame 23-is guided in its upwardmovement-by the rods 16. Theoperation of this portion of the apparatus is as follows; When thesubmerged boatsinks, the pressure in the tubes 3 is increased, therebyincreasing the presinclinometer, (shown'at-ll.) Said'latterappamittinganincreased pressure through'the to said boardby brackets 13 are a pair,of cy'-.

guides 14 slide cup-shaped pistons'15,"said' pistons'being-suitabl'ypacked within the To said pistons 15 are at-.

upon a frame'23. The pins 19 are adj ustablo spring 39 being attached tothe-board 12. Said said rods are provided with pins'19, which v overa'sheet of recording-paper 33. Said 'respring only as permitted by themotion of a i axle of one of the handset said clock, preferably theminute-hand. The upward movei one end to said frame 23 and passed arounda pulley 41 and fixedly secured at the other end,.

sure omthe diaphragms 5 and 6 'andtranstubes 7, thereby pressing upwardthe pistons 15 against the nation or the. Spring 39 and raising theframe 23 as a whole, this change in; depthheing then ,indicatedby meansof an upwardly-inclined line'rnarked upon the recording-paper 33, as thelattertravels, by means of the inking device 32, attached to the frame.If the boat'moves at a uniform-depth; this fact will'be'indicated bythe. line thus marked being horizontal. If

the boat rises, theyline will incline downward. When the'boatis'levehthe pressure in the-twopistons will balance andthe'pointer '29will poiri't'exactlytothecenter-of the are 218, and the line marked bythe corresponding inkingv device 32 will. coincide with that indicatingthe depth of'theboat. These two lines will preferably be marked withdiflferentcolored inks. -Should, however, theboat be inclined, the twolines 'will not coincide. If

the bow of the boat be lower than the'stern;

the pressure transmitted through the forward tube 7 will be'greater thanthat transmitted through the rear tube 7; and the pressures'on the twopistons 15will difier. If the two dia-v phragms in each transmittingdevice were of equal area, then the pressure on the two pistons 15 wouldnot differ however much the boat tilted, for then the pressure on' theinner diaphragm 6 being the same as that on the outerdiaphragm 5v andthe area being the same the pressure per squareinch in the tube v 7would be the same. as that'in the tube 3.

This-pressure per squai-e inch diminishes in passing up the tube 7. if.the latter rises and increases in passing down a descending tube,

the pressure added or subtracted being-that due "to tbecolurnnofwatercorresponding to the difference in depth. Thus the pressures inthe two tubes -7 at the samefdepth would be the same; but, as alreadyseen, the two diaphragms 5 and 6 are of diifer'ent areas, and thereforethe pressurein the tube 7 is not the 'same'as that in the tube 3, but isincreased in the proportion'of, say, two (come if the area of thediaphragm 5 is twice that of the diaphragm 6. In that case,notwithstanding the allowance to be made for the difference in depthsbetween the twoends of the tubes7, the differonce in depthsbetween thebow and the stern of the boat will be indicated by a difference inpressures on the pistons 15. If, however,

the bow of the boat be lower than the stern,

the pressureon the forward piston will be greater than that on the rearpiston and the pointer will point upwardly, "so that the red line markedby the inking device 32 of said pointer will be above that indicatingthe depth. If the bow be higher than the stern, therev'erse will be thecase.

device to automatically adjust the position of the boat to bring it to ahorizontalposition. It may not always bejdesirable that this meansshould be permitted to operate. The means are thrown into operation whendesired by means of a switch 41' in the wire 42.

specified. The meanswill uowbe explained for causing said recording- Atthe bow and stern of the boat are two water-tanks 43 44, connected by awater-tube 45. 'Said tanks are connected from their up per portions bymeans of air-pipes 46 with valve-chambers 47. Said valve-chambers 47 areconnected at their lower portions by means of air-pipes 48 49 with acompresseda'ir chamber-50. From each valve-chamber When closes upon theupper seat 56, thereby close ing-the passage between the air-pipe 46.from the correspondingtank to the air-vent 51, and i .at the same timethe lower valve-plate54 rises from its seat 57, thereby opening a passage for compressed air from the compressed- .air chamber 50 through theair pipes 48 49 .The compressed .air'

to lsaid water '-tank. entering said tank. .iorces the water there'-from through the water-tube 45 tothe other tank, the air in the latterescaping, by means of the other air-pipe 46,-throngh the other v chamber47and air-vent '51. .This displacement of the water from one compartmentt6 the other will continue so'long as. the valve-' stem issupported in-araised position. As soon as the force supporting saidvalve-stem isremoved it will be brought down again by meansof the resilient'forc'e ofthemet-alllic diaphragms 58 59, thus closing the valvepla'te 541119011the valve-seat 57 against the passage of compressed air.

Moreover, by

reason of'the area of the lower diaphragm 59 being greater than that ofthe plate 54 the pressure of the compresed air upon said diaphragm willbe greater than its pressure upon said plate, and this will have theeffect of holding said plate firmly down to its seat. I-clainr 1. In anapparatus of the character described, the combination," with the she lor body of the submarine boat, elf-pressuretransmitters, at the ends oftheboat, actuated by the'external pressure, means for transmitting thepressures therefrom to the same part. of the boat, a device reciprocatedby'bothof said pressures and a lever vibrated by thedifference ofpressures, and moving relatively to said 'device for the purposes 2. Inan apparatus of the character described, the combination, with"the shell'or body of the submarine boat, of pressuretransmitters at the ends ofthe boat,'actuated by the external pressure, means for transmitting thepressures therefrom to the same part of the boat, a device reciprocatedby both of said. pressures, a lever vibrated by the difierences ofpressures, electric circuits connected to said lever and to two pointson i said device, said lever being arranged to close one or the other ofsaid circuits by its move"- 5 ment relative to said device, water-tanksat the ends otthe boat, and means operated by either circuit when closedfor shifting water from one of said tanks to the other,substantially asdescribed.

'3. In an apparatus of the character described, the combination .withthe shell or body of the submarine boat, of an indicator located withinsaid shell mediately of the ends thereof,means fortransmit'tingfluid-pressure from the outside of the boat at theends thereof to saidindicator, and means whereby said pressures so transmitted actuate saidindicator to indicate the difierence in said pressure, substantially asdescribed. '20 4. In an apparatus of the chara'ete1- ..described, thecombination with the shell or body of the submarine boat, of anindicator located within'said shell mediately of the endsthereof,-pressure-transmitting devices at the I a 5 ends of the boat,and operative connections be tween said devices and the indicatorwhereby the latter is operated by said pressures to indicate thedifference of pressures, substantially as described.

5. In an apparatus of the character described, the combination with theshell or body or the submarine boat, of an indicator '-locate'd'.withinsaidshell mediately of the ends' thereof, pressure-transmitting devices.at the ends of the boat, tubes from said pressure-transmitting devicesto saidyindicator, an means whereby fluid-pressures in said, tubes atthe indicator ends operates said in-- dicator, substantially asdescribed.

6. 'In 'an apparatus of the character de-' ,scribed, the combinationwith the shell or body of the submarine boat,'of an indicator locatedwithin said shell mediatelyof the "ends" thereof, said indicatorcomprising 45'gnides ,'pj istons moving in said' guides, rods carried bysaid pistons and apointer operated 'by saidrods, pressure-transmittingdevicesat the ends of the boat, and'tubes from said;pressure-transmitting devices connected 5:: with said guides,substantially as described.

17. In an apparatus of the character described, the combination with theshell or body of the submarine boat, of a pressuretransmitting deviceopen to the external wa scribed.

terspressure, a tube leading from said pres- 55 sure-transmittingdevice, a guide withwhie'h said tube connects, a piston movingin saidguide, and a device operated bysaid piston to indicate said pressure,substantiallyas' described. 6o 8. In an apparatus of the characterdescribed, the combination with the shellor. body of the submarineboat,'of a pressure transmitting device open to the externalWatier-pressure, a tubev leading from said pres- 165 sure-transmittingdevice, a guide with which said tube connects, a piston sliding in saidguide, a rod carried by said piston, means for advancing arecording-sheet-and means carried by said rod for marking said sheet to-79 indicate said pressure, substantially $8116.

, 9.;1n an-apparatns of the character described, the combination withthe shell or' 1 body "(if the submarine boat, of pressuretransniittingdevices, at the ends of the boat open tothe external water-pressure,tubes leading from said deyices, guides with which said tubes areconnected, pistons moving in said guides, rods carried by said pistons,a pointer with which said rods'are pivotallyconnected, a framereciprocated by said rods, said frame carrying an are over which saidpointer moves, and means for indicating the extent of the reciprocationof, said frame, substantially as described.

10. In-an apparatus of the character described, the combination, withthe shell or body-of the submarine boat, of pressuretransmitting devicesat the ends of the boat, an indicator comprising means for advancingarecording-sheet,reciprocating-rods,aframe reciprocated' by said rodsand xnovingover said sheet, a pointer jvibrated by said rods and movingover said frame, devices carried by said pointer and frame for markingsaid sheet, and operative connections from pressure-transmitting devicesto said rods to reciprocate the same, substantially as described.

In witness whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

I HENRY s. LATHROP. Witnesses: l i

F. M. WRIGHT, M. T. BEGLEY.

